The children in the small pictures (2 1/2" x 4") were all born during the Civil War. The tiny picture on the left was dated 1865 on the postage stamp with no identification other than the photographer was in Clinton, Iowa. I think they were sisters. The tiny picture on the right had more information. This was Fanny R. Fulkerson and says the picture was taken in Aug 1867 and this photographer was in Jerseyville, Illinois. I think those are their "best" dresses. Who made the dresses? Probably their mothers. I wonder how they were impacted by the war. Did they have relatives who were soldiers? Which side -- North or South? Lots of unanswered questions.
I couldn't resist making copies of the pictures to include in these two projects. The fabrics suggest the fabrics in their dresses. The one on the left is "Sisters" and the one on the right is "Fanny".